Method of making ornamental blanks.



WITNESSES. M

G. U. MEYER. METHOD OF MAKING ORNAMENTAL BLANKS. APPLIOATION FILED JUNE 11,1908.

Patented May 18, 1909 GEORGE U. MEYER, Ul PROVIDENCE, RHUDE l SLANlll.

LIETHOD OF MAKIKG ORI IAH ENTAL ELANTKS.

gscification of Letters Paton".

Patented May 18, 1909.

Applicatio filed June 3.1, 1908. Eerial N0. 4319M).

To all whom it may concern..-

Be it known that I, GEORGE U. lvlm'nna citizen of the United States, residing at Providence, in the count v of Providence and btate of Rhode island, have invented certain new and useful improvements in Mcthodsof Making Grnamenta-l Blanks, oi which the" character Whose thin walls would otherwise collapse, bend, or become distorted during .the process of construction or reduction; or

become brittle and weak under the action of acid particularly when the walls are of a metal having alow degree of fineness. To insure the thorough removal of every vestige of the core Without ii'ljury to the shell, and

further, to preventdistortion, buckling, and

breaking of the core from the shell during the reducing manipulations.

' 'lothe above ends csscntiallymy invention consists in the novel process described in conjunction with the accompanying drawin'gswhich constitute apart of these specifications. I have discovered that ferrous metals can be successfully used as the cores for precious metal ingots adapted to be reduced into blanks; which ferrous metals, although obviously cheaper and otherwise more eli'ective than the brass andcop er compounds uni versall used, have not lieen employed, presmnal -ybecausc of fear that the oxidation of the iron would prevent a proper union of the parts. Furthermore, any acid which can be successfully used to act upon a core of brass, copper, or compositions ol' eitheneats, rots, or otherwise injuriously all'ects the precious metal shell. This I have found true, for instance, whenever a gold snell 18 of 12 carats or under. By using iron core, howovor, acids can be employedzwhich will oll'cctually remove the iron without injuring thc outer prccious metal she-ll regardless of the carat oi dcgi'cc of fineness. thereof.

. Figure .1 is a perspective view of a seamless cylindrical ingot made by my )rocess. Fig. 2, a like view of seamed ingot likewise constructed. Fig' 3, a similar view of the sanieih process of construction. Fi -l,' a perspective View of a ball or spherical ingot made by my process, and Fig.5, a diametrical secti n of the same.

Like reference characters parts throughout the views.

My process is performed by uniting to a solid or hollow core of iron, steel, or other for.- rous metal a precious metal shell, with or without solder interposed between the shell and core, and subjecting the parts so assembled to heat to fuse the solder, or, if solder is not used, to the alloys in the precious metalfshell. it will be understood that at auy co'nvenient time before assembling the members to be heated as above, their surfaces shouldbe l'luned to facilitate the flow of the solder or fused alloys. Alter allowing indicate like the ingot to cool, it will be found that the shell and core firmly adhere to each other in a practically integral mass.

In forming the cylii'idrical ingot shown in Fig. l, the seamless precious metal shell, A, is united to the ferrous core, B, by the aciding or fusing agent, U, which may be solder in sheet or granulated lot-m applied in any convenient manner, such, for instance, as set forth in United States Patents Nos. 294,732, or 432,690.

In forming ths seamed ingot shown in Fig. 2, the shell, A, and core, 15, are originally flat, as shown in Fig. 3, and areunited in tho llat by the solder sheet'or lihn; 0. Then by a draw plate or other usual tool, the parts are folded and reduced into the seamed cylindrical form shown in Fig.

By iny process, the spherical ingot shown in Fig. 4 islornied, as w as the last described ingot, in the The core, 13*, and shell,

13. are united in the flatv by thewelding.

til)

agent, and the ingot is drawn up into the hollow sphere shown in Fig. 4. A resulting opening, D, appears in the walloi the ingot.

The described forms of ingots may be re 'duccd in diameter and otherwise worked to any desired extent or dimension without the collapse or breaking away of the shell from the, core,

of the ingot is attained, it is innnerscd in di- Whencver the desired dimension luted or undiluted hydro-chloric or sulfuric ametei' of the united parts and finally removing the core by acid. 10' 111 testimony whereof I have ziflixml my precious metal shell intact. v signatui'cin presence. of twu witnesses.

What I claim is, GEORGE U. MEYER.

The process of forming ornamental blanks i Witnesses: cbnsisting in unitii'ig' by fusion to a feribus HORATIO E. .BELLOWS, core a precious metal-shell, reducing the'di-i JOSEHYE. BURNS.

acid indeyenden tly or mixed together, which attacks tie exposed portions of the ferrous COI'CiLIld eats the same away, leav ng the 

